From 697ba2b85a02e1bc67bc9584dc8172fe675d4806 Mon Sep 17 00:00:00 2001 From: "john@roojs.com" Date: Mon, 24 Dec 2018 13:31:53 +0800 Subject: [PATCH] Bezier signature prototype --- Roo/bootstrap/BezierSignature.js | 209 +++++++++++++++++++++++++++++++ 1 file changed, 209 insertions(+) create mode 100644 Roo/bootstrap/BezierSignature.js diff --git a/Roo/bootstrap/BezierSignature.js b/Roo/bootstrap/BezierSignature.js new file mode 100644 index 0000000000..18a1bb9d71 --- /dev/null +++ b/Roo/bootstrap/BezierSignature.js @@ -0,0 +1,209 @@ +/** +* This script refer to: +* Title: Signature Pad +* Author: szimek +* Availability: https://github.com/szimek/signature_pad +**/ + +/** + * @class Roo.bootstrap.BezierSignature + * @extends Roo.bootstrap.Component + * Bootstrap BezierSignature class + * + * @constructor + * Create a new BezierSignature + * @param {Object} config The config object + */ + +Roo.bootstrap.BezierSignature = function(config){ + Roo.bootstrap.BezierSignature.superclass.constructor.call(this, config); + + this.addEvents({ + // raw events + /** + * @event click + * When a Brick is click + * @param {Roo.bootstrap.Brick} this + * @param {Roo.EventObject} e + */ + "click" : true + }); +}; + +Roo.extend(Roo.bootstrap.BezierSignature, Roo.bootstrap.Component, { + + /** + * @cfg(float or function) Radius of a single dot. + */ + dotSize: false, + + /** + * @cfg(float) Minimum width of a line. Defaults to 0.5. + */ + minWidth: 0.5, + + /** + * @cfg(float) Maximum width of a line. Defaults to 2.5. + */ + maxWidth: 2.5, + + /** + * @cfg(integer) Draw the next point at most once per every x milliseconds. Set it to 0 to turn off throttling. Defaults to 16. + */ + throttle: 16, + + /** + * @cfg(integer) Add the next point only if the previous one is farther than x pixels. Defaults to 5. + */ + minDistance: 5, + + /** + * @cfg(string) Color used to clear the background. Can be any color format accepted by context.fillStyle. Defaults to "rgba(0,0,0,0)" (transparent black). Use a non-transparent color e.g. "rgb(255,255,255)" (opaque white) if you'd like to save signatures as JPEG images. + */ + backgroundColor: 'rgba(0,0,0,0)', + + /** + * @cfg(string) Color used to draw the lines. Can be any color format accepted by context.fillStyle. Defaults to "black". + */ + penColor: 'black', + + /** + * @cfg(float) Weight used to modify new velocity based on the previous velocity. Defaults to 0.7. + */ + velocityFilterWeight: 0.7, + + /** + * @cfg(function) Callback when stroke begin. + */ + onBegin: false, + + /** + * @cfg(function) Callback when stroke end. + */ + onEnd: false, + + Point: (function () { + function Point(x, y, time) { + this.x = x; + this.y = y; + this.time = time || Date.now(); + } + Point.prototype.distanceTo = function (start) { + return Math.sqrt(Math.pow(this.x - start.x, 2) + Math.pow(this.y - start.y, 2)); + }; + Point.prototype.equals = function (other) { + return this.x === other.x && this.y === other.y && this.time === other.time; + }; + Point.prototype.velocityFrom = function (start) { + return this.time !== start.time + ? this.distanceTo(start) / (this.time - start.time) + : 0; + }; + return Point; + }()), + + Bezier: (function () { + function Bezier(startPoint, control2, control1, endPoint, startWidth, endWidth) { + this.startPoint = startPoint; + this.control2 = control2; + this.control1 = control1; + this.endPoint = endPoint; + this.startWidth = startWidth; + this.endWidth = endWidth; + } + Bezier.fromPoints = function (points, widths) { + var c2 = this.calculateControlPoints(points[0], points[1], points[2]).c2; + var c3 = this.calculateControlPoints(points[1], points[2], points[3]).c1; + return new Bezier(points[1], c2, c3, points[2], widths.start, widths.end); + }; + Bezier.calculateControlPoints = function (s1, s2, s3) { + var dx1 = s1.x - s2.x; + var dy1 = s1.y - s2.y; + var dx2 = s2.x - s3.x; + var dy2 = s2.y - s3.y; + var m1 = { x: (s1.x + s2.x) / 2.0, y: (s1.y + s2.y) / 2.0 }; + var m2 = { x: (s2.x + s3.x) / 2.0, y: (s2.y + s3.y) / 2.0 }; + var l1 = Math.sqrt(dx1 * dx1 + dy1 * dy1); + var l2 = Math.sqrt(dx2 * dx2 + dy2 * dy2); + var dxm = m1.x - m2.x; + var dym = m1.y - m2.y; + var k = l2 / (l1 + l2); + var cm = { x: m2.x + dxm * k, y: m2.y + dym * k }; + var tx = s2.x - cm.x; + var ty = s2.y - cm.y; + return { + c1: new Point(m1.x + tx, m1.y + ty), + c2: new Point(m2.x + tx, m2.y + ty) + }; + }; + Bezier.prototype.length = function () { + var steps = 10; + var length = 0; + var px; + var py; + for (var i = 0; i <= steps; i += 1) { + var t = i / steps; + var cx = this.point(t, this.startPoint.x, this.control1.x, this.control2.x, this.endPoint.x); + var cy = this.point(t, this.startPoint.y, this.control1.y, this.control2.y, this.endPoint.y); + if (i > 0) { + var xdiff = cx - px; + var ydiff = cy - py; + length += Math.sqrt(xdiff * xdiff + ydiff * ydiff); + } + px = cx; + py = cy; + } + return length; + }; + Bezier.prototype.point = function (t, start, c1, c2, end) { + return (start * (1.0 - t) * (1.0 - t) * (1.0 - t)) + + (3.0 * c1 * (1.0 - t) * (1.0 - t) * t) + + (3.0 * c2 * (1.0 - t) * t * t) + + (end * t * t * t); + }; + return Bezier; + }()), + + getAutoCreate : function() + { + var cls = 'roo-signature'; + + if(this.cls){ + cls += ' ' + this.cls; + } + + var cfg = { + tag: 'div', + cls: cls, + cn: [ + { + tag: 'div', + cls: 'roo-signature-body', + cn: [ + { + tag: 'canvas', + cls: 'roo-signature-footer' + } + ] + } + ] + }; + + return cfg; + }, + + initEvents: function() + { + // assign all object in here... + }, + + isValid: function() + { + // form cannot detect... + } + +}); + + + + \ No newline at end of file -- 2.39.2